Finding the Fourth Proportional to 76,472.61, 105,549.06 and 42,492.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,472.61 : 105,549.06 = 42,492.78 : x
2. Step 2: Convert to fraction form
   76,472.61/105,549.06 = 42,492.78/x
3. Step 3: Cross multiply
   76,472.61x = 105,549.06 × 42,492.78
4. Step 4: Simplify right side
   76,472.61x = 4,485,072,985.79
5. Step 5: Solve for x
   x = 4,485,072,985.79/76,472.61
6. Step 6: Final answer
   x = 58,649.40